body{
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}
#text-input{
    padding: 10px;
    width: 350px;
    height: 60px;
    font-size: 20px;
    border: 0;
    border-bottom: 1px solid #a5a7b1;
    outline: 0;
}
#list{
    text-align: left;
    font-size: 20px;
    list-style: none;
    padding: 0;
}
input[type=checkbox]:checked + span{
    /*   color: red; */
      text-decoration: line-through;
      color: grey;
    }